GNGTS 2013 - Atti del 32° Convegno Nazionale

For the future we plan to include additional synthetic seismograms for a wider range of scenario-events which are representative of the seismogenic potential of the Italian peninsula. In particular, the repository will be enriched by the synthetics for L’Aquila (central Italy) earthquake (April, 2009 Mw 6.3). This earthquake was recorded by 14 near field digital strong motion stations which can be used to validate the synthetics generated in this area (Ameri et al. , 2012). Data coming from the MASSIMO project (Monitoraggio in Area Sismica di SIstemi Monumentali, Cultural Heritage Monitoring in Seismic Area) will be also included. This project is devoted to the assessment of the seismic response of several test buildings which are relevant from the cultural heritage conservation point of view. All the test buildings are located in Southern Calabria, a seismogenic area that in the last three centuries was struck by disastrous earthquakes (epicentral intensity greater than VIII MCS, Working Group CPTI, 2011). Moreover, since a single event can be simulated through several scenarios and therefore produce thousands of waveforms, the next step of our research will be the establishment and implementation of a selection criterion to facilitate and retrieve (within the entire available dataset) synthetic seismograms, based on the statistical distribution of the ground motion parameters (i.e. mean, median, percentiles, etc.). Fig. 3 – PGA values (geometric mean of NS and EW components) for the 1980 Irpinia earthquake generated by the DSM code as shown in the SYNTHETIS database images gallery. The presented scenario corresponds to an unilateral rupture propagation (from SE to NW), constant velocity rupture (2.4 km/s) and heterogeneous slip distribution. The adopted slip distribution (SLIP1_0s_IRP) mimics the one inferred by Cocco and Pacor (1993) for the 1980 Irpinia earthquake. The star represents the instrumental hypocenter (40.76°N, 15.31°E) location. Black triangles and red triangles with a dot indicate, respectively, the virtual receivers and the actual recording stations (Ameri et al. , 2011). In the right portion of the frame an overview of the strong motion maps produced for the selected scenario is also shown. 43 GNGTS 2013 S essione 2.1